61935187138481 has 16 divisors (see below), whose sum is σ = 66808769322240. Its totient is φ = 57226984269840.

The previous prime is 61935187138477. The next prime is 61935187138507. The reversal of 61935187138481 is 18483178153916.

It is a cyclic number.

It is not a de Polignac number, because 61935187138481 - 2² = 61935187138477 is a prime.

It is a super-2 number, since 2×61935187138481² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61935187138411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54938375 + ... + 56054396.

It is an arithmetic number, because the mean of its divisors is an integer number (4175548082640).

Almost surely, 2^{61935187138481} is an apocalyptic number.

It is an amenable number.

61935187138481 is a deficient number, since it is larger than the sum of its proper divisors (4873582183759).

61935187138481 is a wasteful number, since it uses less digits than its factorization.

61935187138481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110993516.

The product of its digits is 34836480, while the sum is 65.

The spelling of 61935187138481 in words is "sixty-one trillion, nine hundred thirty-five billion, one hundred eighty-seven million, one hundred thirty-eight thousand, four hundred eighty-one".